Finding the Fourth Proportional to 12,965.74, 19,449.83 and 10,047.31

Step by Step Solution

1. Step 1: Write the proportion equation
   12,965.74 : 19,449.83 = 10,047.31 : x
2. Step 2: Convert to fraction form
   12,965.74/19,449.83 = 10,047.31/x
3. Step 3: Cross multiply
   12,965.74x = 19,449.83 × 10,047.31
4. Step 4: Simplify right side
   12,965.74x = 195,418,447.95
5. Step 5: Solve for x
   x = 195,418,447.95/12,965.74
6. Step 6: Final answer
   x = 15,071.91